/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineEventsInterface.h
Quick way to send a valid PlayerSessionId with every event, required for Xbox One
void SetPlayerSessionId ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & PlayerId, const [FGuid](API\Runtime\Core\Misc\FGuid) & PlayerSessionId )